Question

multiple choice question
during photosynthesis in the chloroplast, how can photosystem i replace its electron?
o electrons lost from photosystem i are replaced by electrons from nadph.
o electrons lost from photosystem i are replaced by electrons from atp.
o electrons lost from photosystem i are replaced by electrons from photosystem ii.
o electrons lost from photosystem i are replaced by electrons directly removed from water.

Explanation:

In the light - dependent reactions of photosynthesis in chloroplasts, electrons lost from photosystem I are replaced by electrons from photosystem II. Photosystem II donates electrons to the electron transport chain that leads to the replenishment of electrons in photosystem I. NADPH is an end - product of the electron transport chain and does not donate electrons to photosystem I. ATP is an energy - carrying molecule and not an electron donor for photosystem I. Water donates electrons to photosystem II, not directly to photosystem I.

Answer:

Electrons lost from photosystem I are replaced by electrons from photosystem II.